CN221081116U - Self-torsion-resistant screwing device - Google Patents

Abstract

The utility model provides a self-torque-resistant tightening device, which is applied to a rotor shaft, wherein one end of the rotor shaft is provided with an external thread and a torque-resistant structure, the torque-resistant structure is positioned outside the external thread, and the self-torque-resistant tightening device comprises: the bottom end of the outer sleeve is provided with a first inner hole matched with a nut, and the nut is used for locking the rotor shaft and the rotor assembly; the anti-torsion tool is arranged in the outer sleeve, the anti-torsion tool and the outer sleeve can rotate around the same axis and move relatively along the axial direction, and a second inner hole matched with the anti-torsion structure is formed in the bottom of the anti-torsion tool. The utility model has convenient operation, even if the rotor assembly is installed inside the motor, the torsion-resistant structure is still positioned outside the motor, the rotor shaft can be locked by utilizing the torsion-resistant tool, and the rotor assembly and the rotor shaft can be screwed by utilizing the outer sleeve.

Description

Self-torsion-resistant screwing device

Technical Field

The utility model relates to the technical field of motor manufacturing, in particular to a self-torsion-resistant tightening device.

Background

With the development of new energy automobile industry, the permeability of the new energy automobile is rapidly improved, and the continuous improvement of the requirements of the new energy automobile driving motor is pulled.

In a drive motor, the rotor assembly and the rotor shaft are separately rotatable before being fixed, and in order to fix the rotor assembly and the rotor shaft together, the rotor assembly and the rotor shaft are usually locked by a nut at the end of the rotor shaft extending out of the rotor assembly. In the prior art, a torsion-resistant feature, such as an external spline, is arranged on one end of the rotor shaft far away from the nut, and when the positioning torsion-resistant tool is provided with an internal spline matched with the external spline and the nut locking is carried out on the motor rotor assembly, the rotor assembly is placed on the positioning torsion-resistant tool for torsion-resistant locking.

In carrying out the utility model, the inventors have found that at least the following problems exist in the prior art: both ends of some rotor shafts are optical axes, no external spline is provided, and no anti-torsion tool is used, and if the rotor assembly is already installed inside the motor, the external spline of the rotor shaft also enters the motor, so that it is difficult to screw the rotor shaft and the rotor assembly.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems in the related art to a certain extent.

To this end, the object of the present utility model is to propose a self-torque-resistant tightening device which is easy to operate and which is capable of tightening the rotor assembly and the rotor shaft even if the rotor assembly has been installed inside the motor.

In order to achieve the above object, the present utility model provides a self-torque-resistant tightening device applied to a rotor shaft, wherein one end of the rotor shaft has an external thread and a torque-resistant structure, the torque-resistant structure is located outside the external thread, and the self-torque-resistant tightening device includes:

The bottom end of the outer sleeve is provided with a first inner hole matched with a nut, and the nut is used for locking the rotor shaft and the rotor assembly;

The anti-torsion tool is arranged in the outer sleeve, the anti-torsion tool and the outer sleeve can rotate around the same axis and move relatively along the axial direction, and a second inner hole matched with the anti-torsion structure is formed in the bottom of the anti-torsion tool.

According to the self-torsion-resistant tightening device, the torsion-resistant structure is arranged on the rotor shaft, the rotor shaft can not rotate by utilizing the second inner hole locking torsion-resistant structure of the torsion-resistant tool, the nut is sleeved by utilizing the first inner hole of the outer sleeve, and the nut can be driven to rotate by rotating the outer sleeve so as to lock the rotor shaft and the rotor assembly. The whole process is convenient to operate, and because the anti-torsion structure is positioned on the outer side of the external thread, even if the rotor assembly is installed inside the motor, the anti-torsion structure is still positioned on the outer side of the motor, so that the rotor shaft can be locked by utilizing the anti-torsion tool, and the rotor assembly and the rotor shaft can be screwed down by utilizing the outer sleeve.

According to one embodiment of the utility model, the torsion structure is hexagonal, rectilinear or cross-shaped in cross-section.

According to one embodiment of the utility model, the device further comprises a transmission gear set and a servo motor, wherein the transmission gear set comprises a driving wheel and a driven wheel which are meshed with each other, an output shaft of the servo motor is coaxially connected with the driving wheel, and the driven wheel is coaxially connected with the outer sleeve.

According to one embodiment of the utility model, the device further comprises a first mounting plate, a second mounting plate, a linear bearing and a guide rod, wherein the first end of the guide rod is fixedly connected with the first mounting plate, the linear bearing is mounted on the second mounting plate, the guide rod is sleeved in the linear bearing, the second end of the guide rod is provided with a baffle ring, the servo motor is mounted on the first mounting plate, and an output shaft of the servo motor penetrates through the first mounting plate.

According to one embodiment of the utility model, the anti-torsion tool comprises a first mounting plate, a second mounting plate, a cylinder, a support seat and a torsion tool, wherein the cylinder is mounted on the second mounting plate, the support seat is mounted on the first mounting plate, the cylinder is provided with a cylinder push rod, the cylinder push rod is fixedly connected with the support seat, the torsion tool penetrates through the first mounting plate, and one side, close to the cylinder push rod, of the torsion tool is located in the support seat.

According to one embodiment of the utility model, the anti-torsion tool further comprises a sliding sleeve and an elastic piece, wherein the sliding sleeve is sleeved between the outer sleeve and the anti-torsion tool, the sliding sleeve is fixed on the first mounting plate, one end of the sliding sleeve in the supporting seat is provided with a cover plate, and the elastic piece is positioned in the sliding sleeve and sleeved on the anti-torsion tool.

According to one embodiment of the utility model, the torsion-resistant tool comprises a first tool push rod, an inner sleeve and a second tool push rod, wherein the second inner hole is formed in the inner sleeve, the first tool push rod and the inner sleeve are integrally connected, the second tool push rod is detachably connected with the first tool push rod, the outer diameter of the second tool push rod is smaller than that of the first tool push rod, the elastic piece is sleeved on the second tool push rod, and two ends of the elastic piece are respectively opposite to the end faces of the cover plate and the end face of the first tool push rod.

According to one embodiment of the utility model, the device further comprises a proximity sensor and a position sensing piece, wherein the proximity sensor is arranged on the side wall of the supporting seat in a penetrating manner, the second tool push rod penetrates through the cover plate, and the position sensing piece is fixed at the top end of the second tool push rod.

According to one embodiment of the utility model, a first copper sleeve is arranged between the sliding sleeve and the outer sleeve, and a second copper sleeve is arranged between the sliding sleeve and the first tool push rod.

According to one embodiment of the utility model, the inner wall of the sliding sleeve is provided with an inner spline, the outer wall of the first tool push rod is provided with an outer spline, and the inner spline is meshed with the outer spline.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the figures. Wherein:

Fig. 1 is a schematic structural view of a self-torque-resistant tightening device according to an embodiment of the present utility model.

Fig. 2 is a cross-sectional view of a self-torque-resistant tightening device according to an embodiment of the present utility model.

Fig. 3 is a bottom view of a self-torque-resistant tightening device according to an embodiment of the present utility model.

Fig. 4 is a schematic view of the internal structure of a sleeve of a self-torque-resistant tightening device according to an embodiment of the present utility model.

Reference numerals illustrate:

The device comprises a 1-rotor shaft, a 2-rotor assembly, a 3-nut, a 4-torsion structure, a 5-outer sleeve, a 6-torsion tool, a 7-transmission gear set, an 8-linear bearing, a 9-servo motor, a 10-cylinder, an 11-first mounting plate, a 12-second mounting plate, a 13-proximity sensor, a 14-first copper sleeve, a 15-second copper sleeve, a 17-position sensing piece, an 18-elastic piece, a 19-supporting seat, a 20-sliding sleeve, a 21-cover plate, a 61-first tool push rod, a 62-inner sleeve, a 63-second tool push rod, a 71-driving wheel, a 72-driven wheel and a 101-cylinder push rod.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model. On the contrary, the embodiments of the utility model include all alternatives, modifications and equivalents as may be included within the spirit and scope of the appended claims.

Fig. 1 is a schematic structural view of a self-torque-resistant tightening device according to an embodiment of the present utility model. Fig. 2 is a cross-sectional view of a self-torque-resistant tightening device according to an embodiment of the present utility model. Referring to fig. 1 and 2, an embodiment of the present utility model proposes a self-torque-resistant tightening device applied to a rotor shaft 1, wherein one end of the rotor shaft 1 has an external thread and a torque-resistant structure 4. The torsion structure 4 can play a role in supporting the rotor shaft 1 under stress, so that the rotor shaft 1 is prevented from rotating when the rotor shaft 1 and the rotor assembly 2 are locked. The torsion structure 4 is located outside the external thread, in other words the torsion structure 4 is closer to the end of the rotor shaft 1 than the external thread. The self-torsion-resistant tightening device comprises an outer sleeve 5 and a torsion-resistant tool 6.

The bottom end of the outer sleeve 5 has a first inner bore adapted to the nut 3, wherein the nut 3 is used for locking the rotor shaft 1 and the rotor assembly 2. The outer diameter of the nut 3 is greater than the length of the torsion structure 4. The anti-torsion tool 6 is arranged in the outer sleeve 5, the anti-torsion tool 6 and the outer sleeve 5 can rotate around the same axis and move relatively along the axial direction, and a second inner hole matched with the anti-torsion structure 4 is formed in the bottom of the anti-torsion tool 6. The torque tool 6 and the outer sleeve 5 are rotatable about the same axis in order to align the first bore with the nut 3, the second bore with the torque structure 4 and the tightening of the nut 3. The torsion fixture 6 and the outer sleeve 5 are axially movable relative to each other in order that the outer sleeve 5 still continues to extend outwards beyond the locking nut 3 after the torsion structure 4 has been locked by the torsion fixture 6. In use, the rotation and axial movement of the outer sleeve 5 and the torsion structure 4 can be performed manually or by means of automated tools.

In one embodiment, the torsion structure 4 is hexagonal, rectilinear or cross-shaped in cross-section. Correspondingly, the cross section of the second inner hole is hexagonal, in-line or cross. The cross-section of the torsion structure 4 may also be of other shapes.

According to the self-torsion-resistant tightening device provided by the embodiment of the utility model, the rotor shaft can not rotate by utilizing the second inner hole locking torsion structure of the torsion-resistant tool through arranging the torsion-resistant structure on the rotor shaft, the nut is sleeved by utilizing the first inner hole of the outer sleeve, and the nut can be driven to rotate by rotating the outer sleeve so as to lock the rotor shaft and the rotor assembly. The whole process is convenient to operate, and because the anti-torsion structure is positioned on the outer side of the external thread, even if the rotor assembly is installed inside the motor, the anti-torsion structure is still positioned on the outer side of the motor, so that the rotor shaft can be locked by utilizing the anti-torsion tool, and the rotor assembly and the rotor shaft can be screwed down by utilizing the outer sleeve.

In some embodiments, as shown in connection with fig. 1 to 4, the self-torque-resistant tightening device further comprises a drive gear set 7 and a servomotor 9. The transmission gear set 7 comprises a driving wheel 71 and a driven wheel 72 which are meshed with each other, an output shaft of the servo motor 9 is coaxially connected with the driving wheel 71, and the driven wheel 72 is coaxially connected with the outer sleeve 5. When the electric motor works, the output shaft of the servo motor 9 rotates to drive the transmission gear set 7 to rotate, and the transmission gear set 7 drives the outer sleeve 5 to rotate. In one embodiment, the transmission ratio of the transmission gear set 7 is less than 1, and the torque output by the servo motor 9 can be amplified. Optionally, the outer sleeve 5 is provided with a chamfer at the rim of the first bore, increasing the ability to recognise the cap with the nut 3, making it easier for the outer sleeve 5 to slide into the nut 3.

The self-torque-resistant tightening device further comprises a first mounting plate 11, a second mounting plate 12, a linear bearing 8 and a guide rod, wherein the first end of the guide rod is fixedly connected with the first mounting plate 11, the linear bearing 8 is mounted on the second mounting plate 12, the guide rod is sleeved in the linear bearing 8, the second end of the guide rod is provided with a baffle ring, the servo motor 9 is mounted on the first mounting plate 11, and an output shaft of the servo motor 9 penetrates through the first mounting plate 11. The linear bearing 8 can accurately move the servo motor 9 and the capstan 71 in the axial direction. The rotation of the outer sleeve 5 is controlled by the servo motor 9, so that the working efficiency is improved.

The self-torsion-resistant screwing device further comprises a supporting seat 19 and an air cylinder 10, the air cylinder 10 is arranged on the second mounting plate 12, the supporting seat 19 is arranged on the first mounting plate 11, the air cylinder 10 is provided with an air cylinder push rod 101, the air cylinder push rod 101 is fixedly connected with the supporting seat 19, the torsion-resistant tool 6 penetrates through the first mounting plate 11, and one side, close to the air cylinder push rod 101, of the torsion-resistant tool 6 is located in the supporting seat 19. Under the action of the air cylinder, the air cylinder push rod 101 drives the servo motor 9, the transmission gear set 7, the outer sleeve 5 and the torsion-resistant tool 6 to synchronously move.

The self-anti-torsion screwing device further comprises a sliding sleeve 20 and an elastic piece 18, wherein the sliding sleeve 20 is sleeved between the outer sleeve 5 and the anti-torsion tool 6, the sliding sleeve 20 is fixed on the first mounting plate 11, one end of the sliding sleeve 20 in the supporting seat 19 is provided with a cover plate 21, and the elastic piece 18 is positioned in the sliding sleeve 20 and sleeved on the anti-torsion tool 6.

Specifically, the torsion-resistant tool 6 includes a first tool push rod 61, an inner sleeve 62 and a second tool push rod 63, the second inner hole is formed in the inner sleeve 62, the first tool push rod 61 and the inner sleeve 62 are integrally connected, the second tool push rod 63 is detachably connected with the first tool push rod 61, the outer diameter of the second tool push rod 63 is smaller than that of the first tool push rod 61, the elastic element 18 is sleeved on the second tool push rod 63, and two ends of the elastic element 18 are respectively opposite to the end faces of the cover plate 21 and the first tool push rod 61. When the inner sleeve 62 is pressed, the whole torsion fixture 6 can retract towards the direction of the cylinder push rod 101.

The self-torque-resistant tightening device further comprises a proximity sensor 13 and a position sensing piece 17, wherein the proximity sensor 13 is arranged on the side wall of the supporting seat 19 in a penetrating mode, the second tool push rod 63 penetrates through the cover plate 21, and the position sensing piece 17 is fixed at the top end of the second tool push rod 63. By means of the proximity sensor 13 and the position sensing piece 17, it is indicated that the torsion fixture 6 has locked the torsion structure 4 when the position sensing piece 17 is detected by the proximity sensor 13.

In order to reduce wear, a first copper sleeve 14 is arranged between the sliding sleeve 20 and the outer sleeve 5, and a second copper sleeve 15 is arranged between the sliding sleeve 20 and the first tool push rod 61. The inner wall of sliding sleeve 20 sets up the internal spline, and the outer wall of first frock push rod 61 is equipped with the external spline, and internal spline and external spline meshing improve the torsional capacity of inner skleeve when not influencing the axial displacement of first frock push rod 61.

The embodiments described above are related to the following working procedure of the self-torque-resistant tightening device in use, as shown in fig. 1 to 4:

S1, fixedly mounting the device on a bracket or a base through a second mounting plate 12;

S2, after the rotor assembly 2 reaches the installation position, the air cylinder 10 pushes the first installation plate 11 to move downwards;

S3, after the air cylinder 10 moves downwards, the anti-torsion tool 6 firstly contacts the anti-torsion structure 4 on the rotor shaft 1, the elastic piece 18 is compressed, the outer sleeve 5 contacts the nut 3 again, and the nut 3 is compressed by virtue of the thrust of the air cylinder;

S4, the servo motor 9 rotates, and the outer sleeve 5 is driven to rotate through the transmission gear set 7;

S5, the outer sleeve 5 is pressed against the nut 3 to rotate, and two situations exist: (1) The nut 3 rotates along with the outer sleeve 5, at the moment, the anti-torsion structure 4 and the anti-torsion tool 6 relatively rotate, the anti-torsion structure 4 is sleeved by the anti-torsion tool 6 firstly in the rotating process, then the outer sleeve 5 rotates relative to the nut 3, the nut 3 is sleeved by the outer sleeve 5 in the rotating process, and the servo motor continues to rotate until the nut 3 locks the rotor assembly 2 and the rotor shaft 1; (2) The nut 3 and the outer sleeve 5 rotate relatively, the nut 3 is sleeved by the outer sleeve 5, the rotor assembly 2 rotates to drive the anti-torsion structure 4 to rotate relative to the anti-torsion tool 6, the anti-torsion structure 4 is sleeved by the anti-torsion tool 6, the rotor assembly 2 cannot rotate at the moment, and the servo motor 9 continues to rotate until the nut 3 locks the rotor assembly 2 and the rotor shaft 1.

S6, after the nut 3 is locked, the servo motor 9 stops rotating, and the air cylinder 10 is retracted.

It should be noted that in the description of the present utility model, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present utility model, the azimuth or positional relationship indicated by the terms "left", "right", "front", "rear", etc., are based on the azimuth or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and further implementations are included within the scope of the preferred embodiment of the present utility model in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present utility model.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (10)

1. A self-anti-torque device, characterized in that it is applied on a rotor shaft (1), one end of the rotor shaft (1) has an external thread and a torsion-resistant structure (4), the torsion-resistant structure (4) is located outside the external thread, the self-anti-torque device comprising:

The rotor comprises an outer sleeve (5), wherein the bottom end of the outer sleeve (5) is provided with a first inner hole matched with a nut (3), and the nut (3) is used for locking a rotor shaft (1) and a rotor assembly (2);

The anti-torsion tool (6), anti-torsion tool (6) set up in the inside of outer sleeve (5), anti-torsion tool (6) with outer sleeve (5) can rotate and follow axial relative motion around same axis, anti-torsion tool (6)'s bottom be provided with anti-torsion structure (4) looks adaptation's second hole.

2. Self-torque-resistant tightening device according to claim 1, characterized in that the torsion-resistant structure (4) has a hexagonal, rectilinear or cross-shaped cross-section.

3. Self-torque-resistant tightening device according to claim 1, characterized in that it further comprises a transmission gear set (7) and a servomotor (9), said transmission gear set (7) comprising a driving wheel (71) and a driven wheel (72) which are mutually meshed, the output shaft of said servomotor (9) being coaxially connected with said driving wheel (71), said driven wheel (72) being coaxially connected with said outer sleeve (5).

4. A self-torque-resistant tightening device according to claim 3, further comprising a first mounting plate (11) and a second mounting plate (12), a linear bearing (8) and a guide rod, wherein the first end of the guide rod is fixedly connected with the first mounting plate (11), the linear bearing (8) is mounted on the second mounting plate (12), the guide rod is sleeved in the linear bearing (8), the second end of the guide rod is provided with a baffle ring, the servo motor (9) is mounted on the first mounting plate (11), and the output shaft of the servo motor (9) penetrates through the first mounting plate (11).

5. The self-torque-resistant tightening device according to claim 4, further comprising a support seat (19) and a cylinder (10), wherein the cylinder (10) is mounted on the second mounting plate (12), the support seat (19) is mounted on the first mounting plate (11), the cylinder (10) has a cylinder push rod (101), the cylinder push rod (101) is fixedly connected with the support seat (19), the torque-resistant tool (6) penetrates through the first mounting plate (11), and a side, close to the cylinder push rod (101), of the torque-resistant tool (6) is located in the support seat (19).

6. Self-torque-resistant tightening device according to claim 5, characterized in that it further comprises a sliding sleeve (20) and an elastic element (18), said sliding sleeve (20) being sheathed between said outer sleeve (5) and said anti-torque tool (6), said sliding sleeve (20) being fixed on said first mounting plate (11), one end of said sliding sleeve (20) in said support seat (19) having a cover plate (21), said elastic element (18) being positioned in said sliding sleeve (20) and sheathed on said anti-torque tool (6).

7. The self-torque-resistant tightening device according to claim 6, wherein the torque-resistant tool (6) comprises a first tool push rod (61), an inner sleeve (62) and a second tool push rod (63), the second inner hole is formed in the inner sleeve (62), the first tool push rod (61) and the inner sleeve (62) are integrally connected, the second tool push rod (63) is detachably connected with the first tool push rod (61), the outer diameter of the second tool push rod (63) is smaller than the outer diameter of the first tool push rod (61), the elastic element (18) is sleeved on the second tool push rod (63), and two ends of the elastic element (18) are respectively opposite to the end faces of the cover plate (21) and the first tool push rod (61).

8. The self-torque-resistant tightening device according to claim 7, further comprising a proximity sensor (13) and a position sensing piece (17), wherein the proximity sensor (13) is arranged on the side wall of the supporting seat (19) in a penetrating manner, the second tool push rod (63) is arranged on the cover plate (21) in a penetrating manner, and the position sensing piece (17) is fixed at the top end of the second tool push rod (63).

9. The self-torque-resistant tightening device according to claim 7, characterized in that a first copper sleeve (14) is arranged between the sliding sleeve (20) and the outer sleeve (5), and a second copper sleeve (15) is arranged between the sliding sleeve (20) and the first tool push rod (61).

10. The self-torque-resistant tightening device according to claim 7, characterized in that an inner spline is provided on an inner wall of the sliding sleeve (20), an outer spline is provided on an outer wall of the first tool push rod (61), and the inner spline is engaged with the outer spline.